Empty set

An empty set is a set that has no elements.

>>13
Elements cannot be empty
>>14
The common definition is clearly lacking, that's the point of the thread.

>>21
Go troll someone else, the empty set has always been a set. It's guaranteed by the empty set axiom, which is a part of the canonical set theory.

>>15
I've heard this before, but don't understand. What about the empty string?